The Fostex FX speaker driver is well balanced, with a relaxed sound, detailed midrange and good highs also very well assembled. Looking for more information about fullrange drivers, I found the Mathcad worksheets by M. The cavity in the cabinet was filled with gravel to add some mass to the enclosure and prevent resonance. Also, I placed some felt behind the driver and at the end of the line to avoid reflections. When the recording is good for example ‘Songs from the last century’ by George Michael and the recordings from Norah Jones the artists seem to be standing in front of you.

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The FX will need a little help on the bottom end. The Fostex FX speaker driver is well balanced, with a relaxed sound, detailed midrange and good highs also very well assembled.

Another thing is to put in the damping between the inner and back plate as you cannot do this through the driver cut-out once the cabinet is closed. The enclosures were made using 15 mm birch-multiplex, the front baffle and the top is 19 mm beech, and the inner plates are 16 mm MDF. Be sure to seal the box carefully.

Fullrange drivers seem to play music with more coherence, more life and they sound more direct. Naturally you can use material of a different thickness, but be ranfe to adjust the dimensions in the plan. Afterwards I contacted M. For the base-plate I found a ranfe plate at a stonecutter’s store, he made them for a moderate price for me. The cavity in the cabinet was filled with gravel to add some mass to the enclosure and prevent resonance.

Of course they did not play as loud as the bigger two-way speakers that I built before, but something else was fascinating.

Fostex FX DIY ML-TQWT (Transmission Line) Speaker Project

Also, I placed some felt behind the driver and at foztex end of the line to avoid reflections. First I attached nylon strings between the sides to keep the damping material from falling to the bottom.

There is not much information available for this driver, but the feedback from people who have used was positive. The wiring must be in place and the hole in the back for connecting the wire with the BSC has to be sealed. When the recording is good for example fupl from the last century’ by George Michael and the recordings from Norah Jones the artists seem to be standing in front of you.

In my opinion the FX is worth every cent you pay for it. I was surprised with the performance of this driver. Of course the bass doesn’t blow you away, but 50 Hz is there and it fills my room with music. The TQWT enclosure gets good low end from this little driver. I played with the length of the port and tested several values of inductors and resistors for the baffle step correction BSC circuit.

Before I closed the box with front and top there were four things to do. I began to tune them by ear until I was satisfied with the music coming out of the speakers. Figure 1 shows the calculated frequency response for ranve FX for the enclosure shown in Figure 2. At first they were a little bit harsh but after about hours they smoothed out.

Fostex FX120 Fullrange Speaker Driver (Transducer)

I decided fosgex give them a try and was surprised with the sound quality! The two panels out of aluminum on the front and top are anodized in black and covered with a shiny clear coat. King and decided to try a speaker design of my own.

Small group and acoustic music sounds wonderful. On the Fostex data sheet they show a flat frequency response without great peaks and drops. With his feedback “I think you have a design” I want to thank Mr.

However, there fodtex compromises with fullrange drivers; little drivers have disadvantages at the low end and bigger ones at the top end.

Searching a smaller driver the Fostex FX, a 12 cm fullrange unit caught my eye. King and asked him to have a look at the simulation I had completed. The goal was to let them go down to about 50 Hz.